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首页> 外文期刊>Science Immunology >In vivo genome-wide CRISPR screens identify SOCS1 as intrinsic checkpoint of CD4~+ T_H1 cell response
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In vivo genome-wide CRISPR screens identify SOCS1 as intrinsic checkpoint of CD4~+ T_H1 cell response

机译:体内基因组CRISPR屏幕识别SOCS1为CD4〜+ T_H1细胞响应的内在检查点

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摘要

Although CD8~+ T cells undergo autonomous clonal proliferation after antigen stimulation in vivo, the expansion of activated CD4~+ T cells is limited by intrinsic factors that are poorly characterized. Using genome-wide CRISPR-Cas9 screens and an in vivo system modeling of antigen-experienced CD4~+ T cell recruitment and proliferation during a localized immune response, we identified suppressor of cytokine signaling 1 (SOCS1) as a major nonredundant checkpoint imposing a brake on CD4~+ T cell proliferation. Using anti–interleukin-2 receptor (IL-2R) blocking antibodies, interferon-gamma receptor (IFN-gammaR) knockout mice, and transcriptomic analysis, we show that SOCS1 is a critical node integrating both IL-2 and IFN-gamma signals to block multipledownstream signaling pathways abrogating CD4~+ T helper 1 (TH1) cell response. Inactivation of SOCS1 in both murine and human CD4~+ T cell antitumor adoptive therapies restored intratumor accumulation, proliferation/survival, persistence, and polyfunctionality and promoted rejection of established tumors. However, in CD8~+ T cells, SOCS1 deletion did not affect the proliferation but rather improved survival and effector functions, which allowed for optimal therapeutic outcome when associated with SOCS1 inactivation in CD4~+ T cells. Together, these findings identify SOCS1 as a major intracellular negative checkpoint of adoptive T cell response, opening new possibilities to optimize CAR-T cell therapy composition and efficacy.
机译:尽管CD8〜+ T细胞在体内抗原刺激后经历了自主克隆增殖,但活化的CD4〜+ T细胞的膨胀受到固有因素的限制,这些因素的表征不佳。在局部免疫反应期间,使用全基因组CRISPR-CAS9屏幕和抗原经验的CD4〜+ T细胞募集和增殖的体内系统建模,我们确定了细胞因子信号1(SOCS1)的抑制作用,作为主要的非冗余检查点,使得施加了刹车在CD4〜+ T细胞增殖上。使用抗 - 插鲁金-2受体(IL-2R)阻断抗体,干扰素 - γ受体(IFN-GAMMAR)基因敲除小鼠和转录组分析,我们表明SOCS1是综合IL-2和IFN-GAMMA信号的关键节点块多owndownstream信号通路废除CD4〜+ T辅助1(TH1)细胞响应。 SOCS1在鼠和人类CD4〜+ T细胞抗肿瘤过养疗法中的失活恢复了肿瘤内积累,增殖/生存,持久性和多功能性,并促进了对已建立肿瘤的排斥。然而,在CD8〜+ T细胞中,SOCS1缺失不会影响增殖,而是改善了生存和效应子功能,当与CD4〜+ T细胞中的SOCS1失活有关时,这允许最佳治疗结果。这些发现共同将SOCS1确定为继承T细胞反应的主要细胞内阴性检查点,为优化CAR-T细胞疗法组成和功效开辟了新的可能性。

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